Original oil and gas trade vintage ad for CHRISTENSEN DIAMOND PRODUCTS COMPANY. Main office and factory was located at 1937 South Second West, Salt Lake City, UT. How Much Does a Round Trip Cost? Christensen Diamond Drilling Bits for Assurance of Drilling with Fewer Rounds Trips at Less Cost Per Foot. Unique 1953 old oilfield petroleum drilling industry equipment magazine advertisement would look fantastic matted and framed.